Free Wordpress MU/ RSS to Stumbleupon tool?

Hi I am after a tool that will auto create a stumbleupon post for each post on my blog.<br><br>Searching the forum here led me to:<br><br>Onlywire (paid)
<br>wpsynit (paid)<br><br>
<br>Links Alpha (paid)<br>

<br><br>Or this one that looks great:<br>social-networks-auto-poster<br>But is paid only for WP Multi site installs.<br><br>Is there any tool that will allow me to do this for free?<br><br>Thanks<br><br>Piper

So it looks like it's paid services only to automatically get posts into stumblr?